TM 5-3895-374-24-2955-2576.12 THERMOCOUPLECALIBRATIONAll thermocouple input controllers are calibrated in the same manner. A 50.000 mV source, and a J T/C in an Ice Bath arerequired.All thermocouple input controllers are calibrated with a type J thermocouple.This display indicates that a stable, precision noise free 50.000+.005 mV INPUT DC calibration source beconnected to the rear case terminals F (-) and H 50.OO0MV (+). Allow a two minute interval for the inputcircuit to stabilize with the 50.000 mV applied and then push the PARAM DISPLAY key.Without removing the AC power, change the input to a J type thermocouple J T/C in an Ice Bath. Allow a 2minute interval for the input circuit to ICE BATH stabilize and then push the PARAM DISPLAY key.Proceed to Section 6.15.6.13 RTDCALIBRATIONRTD input controllers should be calibrated using a precision decade resistance. Be sure to use short, lowresistance leads and good tight connections. Three wire connections to the input are required to minimizelead resistance errors. All wires must be the same gauge and length.This display is the first step for RTD calibration. Connect the RTD resistance box and set for 100.00±.05Q. Allow a 2 minute interval for the input circuit to stabilize and then push the PARAM DISPLAY key.Set the RTD resistance box for 300.00±.05 2. Allow a 2 minute interval for the input circuit to stabilize andthen push the PARAM DISPLAY key. For controllers with 0.1° RTD resolution, different inputs may bespecified. Proceed to Section 6.15.6.14 PROCESSCALIBRATIONAn appropriate voltage or current source is required for process input calibration.This display is the first step for process input calibration. Connect the calibrator and set its output to theLO calibration value. With a 4-LO CAL 20 mA input, the LO CAL would be 4 mA. Allow a 2 minute intervalfor the input circuit to stabilize and then push the PARAM DISPLAY key.Adjust the calibrator to output the HI calibration value. With a 4-20 Ma input, the HI CAL would be 20 mA.Allow a 2 minute interval for the HI CAL input circuit to stabilize and then push the PARAM DISPLAY key.ECLIPSE INSTRUMENTATION DIVISION(page 3 - 1122)INPUT50.000MVJ T/C INICE BATHINPUTLO CALINPUTHI CAL